Journal of Siberian Federal University. Chemistry / Extractants for the Extraction of Gallium from Zinc Sulfate Solutions

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2025 18 (3)
Authors
Fleitlikh, Isaak Yu.; Grigorieva, Natalya A.
Contact information
Fleitlikh, Isaak Yu. : Institute of Chemistry and Chemical Technology SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Grigorieva, Natalya A. : Institute of Chemistry and Chemical Technology SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation;
Keywords
gallium; zinc sulfate solutions; extraction; cation-exchange extractants; poly(2-ethylhexyl) phosphonitrile acid; stripping
Abstract

The problem of gallium extraction from zinc sulfate solutions can be solved by extraction. In this work, gallium extraction with the following cation-exchange extractants was studied: di(2-ethylhexyl) phosphoric acid (D2EHPA), 7-(4-ethyl-1-methyloctyl)-8-oxyquinoline (Kelex 100), 5-nitro-7-(–4-ethyl-1- methyloctyl)-8-oxyquinoline (Kelex-NO2), poly(2-ethylhexyl)phosphonitrile acid (P2EHPNA). It was shown that these reagents are arranged in the following order according to their extraction capacity: P2EHPNA > Kelex-NO2 > Kelex-100 > D2EHPA. The compositions of the compounds to be extracted are proposed. Gallium stripping from all extractants except P2EHPNA can be carried out with sulfuric acid solutions. Gallium stripping from P2EHPNA is carried out with oxalic acid solutions. Systems with P2EHPNA are of the greatest interest for gallium extraction

Pages
445–454
EDN
DUGLBK
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/157149